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  4. Influence of moment redistribution and compressive membrane action on punching strength of flat slabs
 
research article

Influence of moment redistribution and compressive membrane action on punching strength of flat slabs

Einpaul, Jürgen  
•
Fernández Ruiz, Miguel  
•
Muttoni, Aurelio  
2015
Engineering Structures

The punching shear strength of interior column connections of flat slabs has traditionally been investigated with isolated test specimens subjected exclusively to hogging bending moments. However, the behavior of such specimens is different from that of actual flat slabs, as the potentially beneficial phenomena of moment redistribution between hogging and sagging moments and compressive membrane action cannot take place in the conventional experiments. In the present paper, an axisymmetric numerical model is introduced that allows analyzing the role and significance of these effects on the flexural deformations of continuous flat slabs. Combined with the failure criterion of the Critical Shear Crack Theory, this model can be used to predict the punching capacities of such slabs. Comparisons are made to the results of some unconventional punching tests from the literature showing sound agreement between the modeling results and the experimental observations. The results suggest that the punching capacity of continuous slabs with low amounts of flexural reinforcement in the interior column regions may be underestimated in the current codes of practice.

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Type
research article
DOI
10.1016/j.engstruct.2014.12.032
Web of Science ID

WOS:000351322800004

Author(s)
Einpaul, Jürgen  
Fernández Ruiz, Miguel  
Muttoni, Aurelio  
Date Issued

2015

Publisher

Engineering structures

Published in
Engineering Structures
Volume

86

Start page

43

End page

57

Subjects

béton armé

•

dalle

•

fissuration

•

poinçonnement

•

théorie de la fissure critique

•

reinforced concrete

•

slab

•

crack growth

•

punching

•

critical crack theory

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
IBETON  
GIS-GE  
Available on Infoscience
March 2, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/111795
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